About X, the number of characters to scan for first-strong or any-RTL
algorithm: like everybody, I am only guessing, but I am quite convinced
that the proportion of Arabic/Hebrew documents including at least one LTR
letter is much higher than the proportion of LTR documents including at
least one RTL letter. That means for me that an RTL letter is significant
even if it is not so close to the beginning of the text.
Consequently, I tend to favor a larger X, let's say 255.
Shalom (Regards), Mati
Bidi Architect
Globalization Center Of Competency - Bidirectional Scripts
IBM Israel
Phone: +972 2 5888802 Fax: +972 2 5870333 Mobile: +972 52
2554160